Device for making corrugated cylinders



April 13 ,1926.

V. RETTERATH bEVICE FOR MAKING CORRUGATED CYLINDERS Filed Jan. 5. 1924.n I x Patented Apr. 13, 19.26.

UNITED STATES VALENTIN RETTEBATH, OF INGOLSTADT, GERMANY.

DEVICE FOR MAKING CORRUGATED CYLINDERS.

Application filed January 3, 1924. Serial No. 684,176.

To all whom it may concern:

Be it known that I, VALENTIN RETTERATH, a citizen of the GermanRepublic, residing at Ingolstadt, Bavaria, Germany, have inventedcertain new and useful Improvements in Devices for Making CorrugatedCylinders, of which the following is a specification.

The invention relates to a device for pro ducing corrugations oncylinders such as are used in textile machines by means of rollers whichare rolled in the direction of the longitudinal axis of the cylinder andthereby press grooves therein, the cylinder being rotated onecorrugation space after each operation of the rollers. For this purposerollers having a single circumferential rib have been used, but this hasthe disadvantage that edges are raised on both sides which must eitherbe removed, or together with the edge of the adjacent groove may form anelevation or crest of a corrugation upon the formation of said adjacentgroove. Apart fromthe fact that both possibilities require furtherexpenditure of work, in the former case there is waste of material,whilst in the latter case a corrugation is produced, the crest of whichhas not the compact structure necessary for the proper and eflicientopera tion of these rollers in continual use.

According to the present invention however the corrugations are producedby means of rollers having a plurality of circumferential ribs, thecylinder to be corrugated being rotated one corrugation space after eachoperation of the rollers. The advantage is thereby obtained that notonly is the formation of an edge avoided, but the material pressed upout of the grooves formed in the cylinder is pressed into the elevatedparts or crests of the corrugations so that a compact structure of thematerial is maintained.

In the accompanying drawing I have shown an example of an apparatus forcarrying my invention into effect. Fig. 1 is a diagrammatic view, partlyin section, of the roller and the cylinder to be corrugated thereby,Fig. 2 is a front view and Fig. 3 a side view, partly in section, of anassembled device for carrying out my invention.

The rollers a; are provided with a plurality of ribs which may be ofannular or spiral form, four such annular ribs, 12,, b b and h beingshown in the drawing. The rollers a are further mounted in such a mannerthat they will rotate upon the cylinder ner that the ribs of the rollersawill be impressed during the first operation of the rolling processaccording to my invention, as much as possible, their entire depth intothe cylinder 0. Between the outer ribs, 7),, and 6 as well as betweenthe ribs 5 and b, there will result a pronounced elevated part whilethelinner ribs 6 and 72 will form a nearly finished elevation. For therolling process according to my invention it will be sufliicient toemploy only one pair of ribs on the roller; It is, however, of advantageto employ a plurality of ribs as shown in Fig. 1 for the purpose ofcarrying out the process of rolling in subsequent steps of which thepreceding is preparatory to the subsequent step.

For accelerating the process of rolling according to my invention itwill furthermore be of advantage to employ a plurality of rollers andevenly distribute said rollers around the cylinder in a planeperpendicular to its axis, as shown in Figs. 8 and 4. In the arrangementaccording to Figs. 3 and 4, the roller carrier 03 is provided with fourrollers which are spaced from each other by an angle of 90 degrees thusholding the cylinder between themselves and forming a guide for thelatter.

The rollers a are mounted upon the roller carrier 03 by means ofswinging arms 6 piv oted to guiding members g, which latter are mountedwithin the hollow arms of the roller carrier d, to permit a radialadjustmentof the guiding members and the rollers. Springs serve to presssaid guiding members g in outward direction with their oblique rearparts against the inner oblique surface of the rim or handwheel h, whichis screwed upon the roller carrier 03. Thus, by rotating said rim in oneor the other direction, the rollers will be radially adjusted and entermore or less into the surface of the cylinder 0.

The process of rolling the corrugations according to my invention willbe as follows: The cylinder with its diameter exact ly turned off ismounted within a feed mechanism, whereupon the roller carrier is movedin the direction of the arrow shown in Fig 3 by means of machine power.,During rearward motion of the roller carrier the rollers will swing outtoward-the left, so that they will not be able to perform the rollingprocess. Before the next step oftherollingoperation, the cylinder willbe fed forward according to the pitch of the corrugation as indicated bythe arrow shown in Fig. 1, and thereupon the rolling is continued. If acylinder has thus been fed forward'by an angle of 90 degrees, the secondstep of the process of rolling may be performed by rotating the rim h byhand and adjusting the rollers to a greater depth of rolling, whereuponthe aforementioned steps of rolling may be repeated. The chamber 71 inthe roller-carrier (Z is kept filled with grease, in order to secureproperlubrication, In order tocorrugate the cylinder so as to obtaincorrugations of uneven width, it is advisable'to make the circular ribson the rollers of uneven depth.

lt is to be understood thatthe invention is not limited to the preciseconstruction set forth but that it includes within its purview whateverchanges fairly come within either the terms or the spirit of theappended claims.

I claim:

1. A device of the character described for forming longitudinal ribs andgrooves in' with respect to the cylindrical body, and a roller supportedfrom each of said elements, each roller having a plurality ofcircumvferential ribs formed ithereon.

2. A device of the character described for forming longitudinal ribs andgrooves in cylinders, comprising a carrier movable longitudinally of thecylinder, a plurality of elements mounted in said carrier for radialmovement with respect to the cylinder, arms pivotally connected to saidelements and rollers carried by said arms each of said rollers having aplurality of circumferential ribs formed thereon.

3; A structure as recited in claim 2, in combination with a memberadapted to act upon all of said elements simultaneously, to

move said elements and the rollers forcibly toward the cylinder.

4. A structure as recited, in claim 2, in combination with an annularmember movable axially upon the carrier and having a cam action upon theouter ends of said first named elements, to move said elements and therollers forcibly toward the cylinder.

5. A structure as recited in claim 2, in combination with spring meanstending'to move said elements radially outward, and an annular memberthreadedupon the carrier and having a cam raction upon the outer end ofsaid elements to force all of said elements simultaneously and forciblyinward to bring the rollers into forcible engagementwith the cylinder.

In testimony whereof I have hereunto aff xed my signature.

VALENTIN RETTERATH.

